Some of the toughest ultra-endurance runners on the planet will be taking an epic 48-hour, 100-mile run through the High San Juans on July 11-13, starting at 6 a.m. in from of the Silverton School.

Race director Dale Garland says he expects that about 24 hours later, the first of 140 runner will cross the finish line at the school, after doing a clockwise loop from Silverton to Telluride, Ouray, and across the divide to Sherman, over to Pole Creek and back to town.

Garland said race volunteers are monitoring rain conditions and watching for the possibility of flash flooding as a strong monsoon pattern kicks in.

Garland said there are lot of strong competitors in this year’s race, as usual, but with such a grueling course, anything can happen.